Steam-generator.



Patenigd nec. 4, |900.

2 Sheets-Sheet l.

INVENTOR A". HERSCHMANN.

STEAM GENEBATUR. (Application filed Febf 2s, 1900.) (lo Model.)

,THE Ncnms PETERS co.. Pnomu'mov. wAsmNsToN, u.

WITN ESSES No. 003,027. ,f Patented Dec. 4, |900.

A. HERSCHMANN. V STEAM GENERATOR. (Appnqeion med Feb. l2s, 1900.)

` 2 Sheets--Sheet 2.

(no Modem INVENTOR wlTNEssES irren STATES .A'rnN @unicee ARTHURHERSCHMANN, OF NEW YORK, N. Y., ASSIGNOR .TO L. C. WEIR, OF

` SAME PLACE.

STEAM-G EN ERATO R.

SPECIFICATION forming part of Letters Patent No. 663,027', datedDecember 4, 1900. Application iled February 23., 1900. Serial No. 61146.(No model.)

To all whom, it may concern:

Beit known that I, ARTHUR HERSCHMANN, a subject of the Emperor ofAustria-Hungary, residing at the city of New York, borough of Manhattan,and State of New York, have invented certain new and useful Improvementsin Steam-Generators, of which the following is a full, clear, and exactdescription.

Thisinvention relates to steam-generators.

Io The object of theinvenlion is to provide an apparatus of smalldimensions and compact structure which will be capable of making steamrapidly and provided with features rendering it well adapted for useupon selfpropelled vehicles. Among the requirements of such a boiler maybe mentioned the ability to get up steam quickly, small size for a givenhorse-power, and adaptability in shape for convenient disposition uponthe Vehicle.

zo The invention consists of the constructions and combinationshereinafter fully,described, and particularly pointed out in the claim.

In the accompanying drawings, Figure l is a vertical section of myimproved boiler, and

Fig. 2 is a horizontal section of the same on line oc a; of Fig. l.

Referring to the drawings by letter, A represents the outer cylindricalshell, provided with the brackets d for supporting it on any 3o suitableframework. Inside of this shell is another shell B, constituting the reand tube chamber. At the lower end of this chamber is the grate C, andthe upper end is closed by a tube-sheet D, the center of which is open 35 to provide a passage for the fuel, which passage is formed by a shortlength of pipe d, passing from the tube-sheet upward through the centerof the top of the outer shell, where it is closed by a cover d. Thiscover is car- 4o ried at the end of a lever e, which is pivoted to thebracket e', somewhat remote from the edge of the cover, so that when thecover is" lifted for the admission of fuel by swinging the outer end ofthe lever downward it will leave the entire opening clear.

The grate C is formed of two semicircular parts, with their diametricalsides parallel and hinged by means of rods c, resting in brackets c. Theparts of the grate are nor- 5o nially supported in the same horizontalplane by latches c2, which engage angular projections c3 from the edgesof the grate-sections. By lifting these latches the two sections of thegrate will swing downward toward each other and dump the contents of thegrate. No claim is made herein to this form of grate. The tubes for thecirculation of the water are indicated at f. They are vertical for thegreater part of their length and are arranged in a nest in theirechamber, surrounding the 6o vertical axis thereof. The upper ends ofthe tubes project through the tube-sheet D, and

their lower ends are curved outward immediately above the iire and passlaterally through the shell ofthe fire-chamber. The water occupies theannular space between the two shells A B, the normal water-line beingslightly above the tube-sheet D, the space above the water-line beingfor steam,as usual. Thus it will be seen that the tubes furnish 7ocirculatory passages of great capacity which bring the water into closerelation with the burning fuel.

For the purpose of distributing the heat throughout the entire nest oftubesI divide the smoke-flue into two parts and connect them with thefire-chamber at the upper end thereof and at diametri'cally oppositepoints, as indicated at s and s. In this way the products of combustioninstead of being directed into 8o contact with 'the tubes on one side ofthe boiler are caused to make substantially equal Contact with all thetubes. The two smokeflues lead directly into a semicircular pipe s2,which embraces one-half of the exterior of the boiler and connects withthe base of the stack S, leading vertically upward at the rear of theboiler. This passage for the fuel is continued below the tube-sheet D bya coil of pipe G, extending nearly to the bed of fuel.` 9o This coil,besides giving shape tothe fuelpassage, also serves as a baiiie todirect the heat and products of combustion toward the sides of thefire-chamber where the tubes are located, and it also serves as asuperheating device for the steam. For the last-mentioned purpose oneend of the coil (indicated by g) leads upward through the fuel-passaged,then laterally outward, and finally to the steamspace of the boilerthrough the pipe g. To roo this pipe g there is also connected a safety-,valve h and a valve t', by which steam may be cut oi entirely from thecoil G. The other end of the coil G (indicated by g2) also leads upwardthrough the fuelpassage and then by pipe g3 to the engine or othersteam-consuming apparatus. It will be seen that the su pporting-coilexposes a large surface to the direct action of the heat and that thepressure of the steam passing through it from the` steam-space Will bematerially increased.

Immediately surrounding the fire-space of the boiler, Where it Will besubjected to the` greatest heat, I locate a hollow ring R, whichcommunicates by means of the pipe rwith the exhaust-passage of anengine. Another pipe r/ connects with the ring at a point di-` thereforeeliminate the objectionable feature of the exhaust of the engine and isto that extent Well adapted for use in a self-propelled vehicle.

While it has been stated that this boiler is specially adapted forself-propelled vehicles, it is to be understood that'its use extends toall other conditions to which steam-boilers are applicable.

Having described my invention, l claim- In a Vertical steam-boiler, thecombination of a fire-chamberprovided with a nest of vertical tubesarranged in a circle around an axial fuel-passage, a cylindrical ba-lerin the form ot a coiled tu be, lining the circular nest of tubes andgiving shape to the fuel-passage, and two smoke-lines arranged atdiametrically opposite points substantially as and for the purposesetforth.

In Witness whereof I subscribe my signature in presence of twowitnesses.

ARTHUR HERSOI-IMANN.

Witnesses:

WM. A. RosENBAUM, CLARENCE C. ACKERLY.

